800 V Fast Charging and the Electric-Drive Transition: a Test Perspective

the development trend of next-generation intelligent electric vehicle technology

market research data shows that over 80% of users 80% of users are dissatisfied with the charging speed and driving range of electric vehicles. Although the new energy vehicle market has changed rapidly in recent years, there is still significant room for improvement to meet consumers' psychological expectations and higher usage needs

new800V ultra-fast charging technology can effectively address the range anxiety and slow charging speed of electric vehicles, Meanwhile, 800V The emergence of ultra-fast charging architectures has also brought new technical challenges to the automotive industry: automotive electric drive systems, electronic control systems, onboard chargersOBC, DC-DC and other related technologies in multiple fields also need comprehensive improvement.

800VThe core of electric drive technology under the new architecture is to enable SiC, GaN third-generation semiconductor devices. What has technological evolution brought to new energy vehicles?

technical advantages

● improves the efficiency of the electric drive system

● reduces operational losses

● reduces volume

● solves range anxiety and slow charging

test challenge

● The original testing instruments and methods do not meet the requirements

● unfamiliar with the performance of third-generation devices

● is based on design experience with third-generation devices

● has been addedEMI difficulty

Engineers face testing challenges at every stage of the electric drive design workflow > 800V

1. Core device evaluation and selection

● static and dynamic characteristics

● pulse test

● High-bandwidth voltage and current acquisition

● channel transmission delay compensation

● Parasitic noise control in the power circuit

● ATE testing system

● reliability and failure mechanism

● Vth drift

● Rdson drift

2. electric drive product development

● high-frequency, high-voltage common-mode interference

● crosstalk

● SOA

● switch loss

● loss

● loop response

3. bench test

● three-phase phase vector map

● current harmonics

● efficiency test

● trend dynamic analysis

● DQ0

● remote control of the test equipment

reprinted from Tektech